Pituitary gland
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Pars tuberalis proper and median eminence of the pituitary gland of a pigeon (HE)
The pars tuberalis proper forms two lateral sheaths on the surface of the median eminence and the infundibular stem of the neurophypophysis that can fuse caudally, subjected to individual variations. The sheaths can extend anteriorly on the ventral surface of the brain to the region of the optic chiasm and can laterally extend up onto the diencephalon.